在
,
,
为
边上一点,点
、
分别在
、
边上,且
.作
于点
,
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/f63c875b-329b-4708-8ed7-1de65ce406ea.png?resizew=568)
(1)特殊验证:如图1,若
,且
为
中点,求证:
,
;
(2)拓展探究:若
.
①如图2,若
为
中点,(1)中的两个结论有一个仍成立,请指出并加以证明;
②如图3,若
,条件中“点
在
边上”改为“点
在线段
的延长线上”,其它条件不变,请探究
与
的数量关系并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47f2874795e9df280e3e0bec171358e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a743a97fd860358a222b2e7551faed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc936d478f47c519ce4aea86dd1e942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/f63c875b-329b-4708-8ed7-1de65ce406ea.png?resizew=568)
(1)特殊验证:如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
(2)拓展探究:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e746bce74c14b20d09f924f2c0446774.png)
①如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4bba9b7c85edbaa5d166e5b46bf13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
更新时间:2023-11-06 18:27:35
|
相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】小球悬挂处
点到地面
的距离是4米,小球从静止状态
处开始摆动,摆动到最高点
时,测得
到
的距离为3米,距离地面2.3米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/e396b887-4e58-4a47-8b1b-8e31749e2bee.jpg?resizew=178)
(1)求小球摆动到垂直于
位置时
到
的距离;
(2)求
到地面的距离,写出必要的推理过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/e396b887-4e58-4a47-8b1b-8e31749e2bee.jpg?resizew=178)
(1)求小球摆动到垂直于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
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解答题-证明题
|
适中
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【推荐2】在小学,我们知道正方形具有性质“四条边都相等,四个内角都是直角”,请适当利用上述知识,解答下列问题:
已知:如图,在正方形
中,
,点
是射线
上的一个动点,以
为边向右作正方形
,连接
.
(1)填空:
________
;(填度数)
(2)若点
在点
的右边.
①求证:
;
②试探索:
的值是否为定值,若是,请求出定值;若不是,请说明理由.
(3)若点
是直线
上的一个动点,其余条件不变,请写出点
与点
之间距离的最小值,并适当说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/73901322-2cb4-4bf2-b7d5-17e5889897bf.jpg?resizew=363)
已知:如图,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36a1938df65db2b68bf7595b97bafa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935ad59079c158ea0f92018fc548e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1818eeef9d671eb1430c3945e9ac776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e25b3674dbd3584ef33cf9eeed9a061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e449c36f8ff4b6aee836f08204df43.png)
②试探索:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c41f42370f0d1b864e96952ab749209.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,
的三个顶点都在
上,
,过点A作
交
的反向延长线于点D.
(1)求证:
是
的切线;
(2)若四边形
是平行四边形,且
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/181933ea-749f-4900-8037-2913d908564b.png?resizew=214)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在长方形
中,
,
,现将该长方形沿对角线
折叠,使点
落在对点
处,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8f21641c-6bf1-4902-81b2-925a8fcd6e59.png?resizew=156)
(1)试说明
;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8f21641c-6bf1-4902-81b2-925a8fcd6e59.png?resizew=156)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-证明题
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适中
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【推荐1】已知,正方形ABCD,点P在对角线BD上,连接AP、CP(如图①)
![](https://img.xkw.com/dksih/QBM/2011/12/27/1573318207840256/1573318257000448/STEM/c87b2227ad134a1d9647679b0030e164.png)
(1)求证:AP=CP.
(2)将一直角三角板的直角顶点置于点P处并绕点P旋转,设两直角边分别交DC、BC于E、F,
a.若旋转到图②位置,使PE与PA在一直线上,求证:PF=PA.
b.若旋转到图③位置且PD∶PB=2∶3,求PE∶PF的值.
![](https://img.xkw.com/dksih/QBM/2011/12/27/1573318207840256/1573318257000448/STEM/c87b2227ad134a1d9647679b0030e164.png)
(1)求证:AP=CP.
(2)将一直角三角板的直角顶点置于点P处并绕点P旋转,设两直角边分别交DC、BC于E、F,
a.若旋转到图②位置,使PE与PA在一直线上,求证:PF=PA.
b.若旋转到图③位置且PD∶PB=2∶3,求PE∶PF的值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,有一块矩形塑料模料
,长为10cm,宽为4cm.将你的手中足够大的直角三角板
的直角顶点
落在
边上(不与
、
重合),在
上适当移动三角板顶点
.当三角板两直角边刚好分别通过点
与点
时,求
的长.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/14/ed92c486-89f7-439e-b6f4-71c2193aceb5.png?resizew=151)
您最近一年使用:0次